Conductometric and electrometric studies of ferric succinate

Abstract

The changes in conductivity during the formation of colloidal ferric succinate by the interaction of ferric chloride and sodium succinate have been investigated. It has been observed that initially there is a decrease of conductivity on the addition of sodium succinate to a fixed quantity of ferric chloride. This is due to the neutralisation of free hydrochloric acid present in ferric chloride. On further addition of sodium succinate the conductivity increases slightly followed by a marked decrease. The increase is due to the formation of sodium chloride by the interaction of ferric chloride and sodium succinate and the decrease is certainly due to the formation of colloidal ferric succinate and other complexes. The conductivity finally increases after the equivalence point is reached due to the presence of excess of sodium succinate. The electrometric titration curve shows an inflexion point corresponding to the equivalence points of the reactants.